Margaret mcdermott executrix of john mcdermott



(No Moda.) 3 sheets-sheet 1.

T. F. BARNUM & J. MGDERMOT EMBROIDERING MACHINE.

No. 513,861. Patented Jan. so, 1894. I

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(No Model.)l 3 Sheets-Sheet 2.

T. F. BARNUM & J. MODERMOTT. EMBROIDBRING MACHINE.

No. 513,861. Patented Jan. 30, 1894.

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(No Model.)

No. 513,861. Patented Jan. 30, 1894.

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UNITED STATES PATENT OFFICE.

THEODORE F. BARNUM AND JOHN MODERMOTT, OF TROY, NEW YORK; MARGARETMCDERMOTT EXEOUTRIX OF JOHN MCDERMOTT, DEOEASED.

EMBROIDEFtlNG-MACHINE.

.SPECIFICATION forming part of Letters Patent N o. 513,861, datedJanuary 30, 1894.

Application filed March 24, 1891. Renewed May 19,1893. Serial No.474,835. (No model.)

.To a/ZZ whom it may concern:

Be it known that we',THEoDoRE F. BARNUM and JOHN MODERMOTT, citizens ofthe United States, residing at Troy, county of Rensselaer, and State ofNew York, have invented certain new and useful Improvements inOrnamental Sewing-Machines, of which the following is a specification.

Ourinvention relates to such improvements ro and consists of the novelconstruction and combination of parts hereinafter described andsubsequently claimed. Y

Reference may be had to the accompanying drawings, and the letters ofreference marked x5 thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.Figure 1 is a view in side elevation of our zo improved ornamentalsewing machine, with the lower part of the pattern-chains broken away.Fig. 2 is a top plan view of the same with the bracket-arm andcloth-clamp removed. Fig. 3 is a topplan view showing the z 5cloth-clamp holding a piece of fabric upon the cloth-plate with acomplete pattern-figure stitched therein. Fig. 4 is a vertical sectionof the clamp, fabric and cloth-plate, taken on the broken line, 4 4, inFig. 3. Fig. 5 is a 3oV plan view of a section of one of thepatternchains. Fig. 6 is a bottom plan view of one of the bifurcatelevers acted upon by the patl tern-chains to communicate position m0ve`ments to the cloth-plate.

In our improved machine any of the Wellknown kinds of stitch-formingmechanism maybe employed. We prefer that mechanism which produces theWell-known lock-stitch with two threads, and we have shown in the 4odrawings only such parts of the stitch-forming mechanism as will aid ina full understanding of our invention, the leading features of whichconsist in the mechanism for automatically imparting to the cloth-plate,having a universal movement in a horizontal plane, intermittentposition-movements alternating with the upward movements of thesewing-machine needle, and Variable in extent and direction as desired,whereby sew- 5o ing-machine stitches may be inserted in fabric or othermaterial t0 form a figure thereon corresponding in form with apredetermined pattern; and the mechanism for clamping the fabric to thecloth-plate. The cloth-plate, upon which the fabric is clamped, ismovable to and fro in a slide-way or upon guides secured to aslide-plate. The slide-plate is likewise movable 'to and fro upon thebedplate of the machine, butin a direction right angular to thedirection of the relative movements of the cloth-plate. By communicatingto both plates the necessary slide-movements, the desired parts of theclamped fabric can be successively brought to the proper position-pointto successively and properly locate in the fabric the stitches requiredto form the desired figure, which position-pointnis in the fixed path ofthe needle. The required movements of the cloth-plate and fabric may betermed position-movements. The positionmovements are the resultant ofthe right-angular slide-movements of the movable plates. Theslide-movements of each plate are produced by an independent set ofpatternchains, actuated by the sewing machine mechanism and havingsuitable connections with their respective plates.

Referring to the drawings, A- is the bedplate of the machine from oneend of which is erected the standard, A', supporting the usual hollowbracket-arm, A2, containing the main driving-shaft, A3, provided withthe drivingpnlley, A4, fixed thereon and auxiliary bearings, -A5, fixedupon the bracket-arm. The driving-shaft also has the usual camconnections, not shown in the drawings, with the needle-bar, A, for impartingvertically reciprocating movements thereto and to the needle A7, fixedin the lower end of the need le-bar.

The cloth-plate, B, is secured at one edge upon the guide-rod, B', bythe lugs, B2, adapted to slide longitudinally of the rod, and theopposite edge of the plate is beveled, as shown at B3, to t and slide inthe correspondingly beveled groove, B4, in the slide-plate, B5, as shownin Figs. l and 2. The slide-plate is provided With the bracket-lugs, B6,which support the guide-rod, B', the ends of which are fixed therein.The slide-plate is supported IOO on opposite sides by guide-rod, B1,secured at each end to a bracket-lug, B8, projecting from the bed-plateor fixed part of the machine. The slide-plate has on each of such sidesa projecting lug, B9, adapted to slide longitudinally of the guide-rods,B7.

The guide-rod, B', which forms a slideway for the cloth-plate extendsat-right angles to the guide-rods, B7, which form a slideway for theslide-plate, so that the cloth-plate neces sarily partakes of all thereciprocating movements imparted to the slide-plate; and, whenindependent slide-movements, right angular to the movements of theslide-plate, are imparted to the cloth-plate, the absolute or re`sultant movement of the cloth-plate affords what has been hereinbeforedescribed as the position movement. Slide movements are communicated tothe slide-plate by means of a pattern-chain, C', having the pins, orteeth, C, projecting from its exterior surface, one pin from each link,C2, of the chain. The pins have the function of teeth on a wiper- Wheel.The chain runs over the chainwheel, C3, and each link is provided with apair of lugs or spurs, C4, projecting oppositely from the edges of thechain, adapted to enter and t corresponding grooves, C5, in theperiphery of the chain-wheel. The periphery of the chain-wheel is alsoprovided with a circumferential groove adapted to receive the body ofthe several links forming the chain which fit closely therein to preventanylateral movement of the chain upon the chain-wheel. An intermittentrevoluble movement is imparted to the chain-wheel by means of a pawl,CG, pivoted upon the lever, C7, and adapted to engage the ratchet-wheel,C8. The ratchet is fixed upon the chain-wheel shaft, C9, which has itsbearings in the uprights, C10, and C12, xed to the bed-plate of themachine. The spring, C13, serves to keep the ratchet-Wheel in place whenthe pawl is not in action. The lever, C7, is pivoted at one end upon thechain-wheel shaft, and is provided with a friction roller, O14, adaptedto follow the inclined plane or cam, C15, fixed to revolve with thegear-wheel, O1, which wheel is supported by a sleeve, C17, revolubleupon a stem, C18, fixed upon the bed-plate. The gear-wheel is driven bythe gear-wheel, C19, fixed upon the vertical shaft, C20, having on itsupper end a beveled gear, C21, adapted to engage with a beveled gear,C22, Iixed upon the main driving shaft, A3. The cam, C15, is so locatedupon the gear-wheel, that it engages the friction-roller, C14, while theneedle is above the cloth-plate, and serves to move the periphery of thechain-wheel a distance equal to the length of one of the chain-links,causing one of the teeth, C, to enter between the arms, D, secured tothe lever, D', which lever is pivoted, at D2, upon the standard, D3,secured to the bed-plate by screws, D4. The lever, D', is connected bylink, D7, with rocklever, D8, fixed upon the vertical rock-shaft D9, andthe rock-lever, D10, secured to the same rock-shaft, in a position rightangular to the rock-lever, D8, is connected by link, D12, with theslide-plate.

It the tooth, C, is located opposite the passageway between the arms, D,it passes between the arms without impartingany movement thereto; but ifthe tooth is located on one side of the passageway, it will engage withthat one of the arms located on the same side and swingr the lever, D',toward that side, thereby actuating the rock-shaft and, through it,imparting to the slide-plate a slide-movement. Should the next tooth inthe series of teeth be located on the opposite side of the passageway,it'will engage the other arm and impart to the slide-plate through thevarious connections, a slidemovement in the opposite direction. Bylocating the teeth at the proper points in the series of links, anydesired slide-movement may be imparted to the slide-plate each time atooth passes between the arms. Another chain wheel, F, fixed upon shaft,F', supported by uprights, F2and F3, is provided with a similarpattern-chain, E. The intermittent movements of chainwheel, C3, arecommunicated to chain-wheel, F, through the gear, C11, fixed upon shaft,C, gear, F1, fixed upon shaft, F', and the intermediate gear, F5,supported on shaft, F6, by upright, F7. The teeth in chain, E, engagethe arms, or jaws, F8, of the bifurcated lever, F9, to impartslide-movements to the clothplate, the bifurcated lever being connectedby link, F10, with the lever F12, intermediately of its ends, one end ofthe lever being pivoted to the bed-plate at F13, and the otherendmovably connected with a projecting arm, F14, fixed upon thecloth-plate. By properly locating the teeth in the chain, E, any desiredslide-movement may be communicated to the cloth-plate simultaneouslywith and right-angularly to the movements of the slide-plate. A changein the position of the teeth on one or both of the pattern-chains willproduce a corresponding change in the successive position-movements ofthe cloth-plate, and consequently in the form of the ornamentalpattern-tigure produced by the stitches.

The slide-plate and the cloth-plate are each provided with a centralaperture, I-I, H', suflciently large to form a clear passageway for thereciprocating needle in every position of the plates.

H2- represents the needle-aperture in the bed-plate of the machine. 1

We are well aware that it is common to move fabric-carrying slides bymeans of various styles of pattern-cams; but the mechanism heretoforeemployed was not adapted to accurately produce and reproduce the seriesof position-movements necessary for the successive formation of'distinct ornamental figures by means of stitches of considerable andvarying amplitude. By causing the pattern to depend upon the locationot' the teeth laterally of the chains, without reference to the lengthof the teeth, all the movements of IIO vro

the bifurcate lever'are positive'and/no't springactuated. Thereis nosuperfluous movement `of the levers and slide-plates such as would-takeplace if'tthe tooth-engaging lever were a the constant positionbyeach successive tooth in the. pattern.l The bifurcate lever remainspassive in the position in which it is left by.

the tooth last in engagement with it` until acted upon by the' nexttoothin the chain, so

that the movements are effected with little wear or strain upon thevariousparts, the

teeth successively striking the jaws or bifur-` cate arms alternately.The bifurcate lever comprises the fram-e or arm,.D, pivoted at D2, tovibrate in a horizontal plane, andthe bifurcate frame, H3, pivoted atH4, upon the lever, D', to vibrate in a vertical plane. The bifurcateframe has a cross-bar, H5, which Y forms a bearing place for the spring,H6, xed

upon the lever-arm, D. The arms of the bifurcate frame support thedetachable jaws, H7, which are directly engaged by the chainteeth. Thespring, H6, presses thejaws down upon the chain-links to prevent themfrom tipping when the teeth strike the jaws. The bifurcate arms are alsoeach provided with an adjustable shoulder consisting of aV screw, H8,inserted in a screw-threaded aperture in the arm. These shoulders are4adapted to bear against opposite sides of thelever arm and relieve thestrain upon pivot, H4. The jaws, H7, are made of steel plates andadjustably secured to the bifurcate arms by screws, H9, passing throughslots in the plates into screw-threaded holes in the arms.y As anadditional protection against a spreading movement of the jaws or plateswhichmight otherwise be effected by-the engagement of the chain-teethwith the jaws, We provide the abutting screws, H10, adjustable invscrew- Athreaded holes in the lugs, H12, depending from the bifurcatearms. Should the beveled edges, H13, of the jaws which are `engaged bythe teeth wearl away, the jaws can be forced nearer together by thescrews, H10. We are. thus able not only to easily and quickly adjust thevarious parts for accuracy and to take up the wear, but to detach wornteeth or jaws and substitute new ones therefor.

rlhe size of the ornamental figure can be varied by changing the pivotalconnection of the link, D7, with lever, D', from one to the other of theholes, H14, in the lever, D', and in a similar vmanner the pivotalconnection of the link, F10, with the lever, F9. Rotary cams, adapted togive positive reciprocating movements in both directions areimpracticable for the reason'that their practical dimensions would notpermit the required amplitude and number of position-movements necessaryto produce the desired ornamental figures, which movements can be easilyobtained by means of a toothed chain and bifurcate lever such as we haveshown and described, of convenient dimensions. The teeth can beaccurately located inthe respective chain-links to produce the enactmovements required. The detachable teeth and j aw-plates can also beconveniently tempered or case-hardened to reduce variation due to wear;and when worn, they can be easily and quickly removed and new onessubstituted. Y

The fabric, J, Figs. 3 and 4, is secured to the cloth-plate by a clampwhereby it is compelled to partake of the position movements of theplate.

Thepattern-gure, J', is` composed of a series of stitches ofconsiderable and varying amplitude, and ifthey are inserted in thin orreadily yielding fabric, the tension of the thread forming the stitchesdraws together and contracts that portion of the fabric inclosed by suchstitches, causing the fabric to pucker and present a wrinkled appearancearound they figure, unless the fabric is previously stretched at theplace where the figure is to be inserted.- We therefore provide a clampwhich will stretch the fabric about equally in two directionsapproximately right angular to each other, whereby the warp and woofthreads of the fabric can be stretched about equally. The stitchesforming the pattern ligure are frequently inserted in garments at theends of pockets or other openings to provide an ornamental stay, and thegarment seams give the fabrican uneven surface which would prevent anintegral clamp from engagingthe fabricsecurelyon all sidesof the partdesigned to receive the iigure-forming stitches. The fabric-engagingportions of the clamp are therefore madein sections, each section havingan independent spring-control. The U -shaped bracket, J2, supports theclampmechanism. rlhe arms of the bracket are approximately horizontaland located in the same vertical plane, the lower arm being secured atthe open end of the bracket to the cloth-plate bythe screws, I, Fig. 2,and the upper arm supporting the clamp-levers, thereby affording roomfor the fabric to extend back between the arms to the connecting bend.The clamp mechanism comprises the integral rectangular frame, J 3,having the curved arms, J4, which terminate in a socket or eye, J5,adapted to receive the vertical supporting bar, J6, shown in horizontalsection in Fig. 3. Each side bar of the rectangular frame supports anindependent clamping section, J7, consisting of a piece of sheet-metal Ushaped in cross-section, which is loosely supported upon the bar in aninverted position, as shown in Figs. l, 3 and 4. The inne'r wall of eachclamping section has its lower edge smooth and the lower edge of theouter wall is serrated, as shown in Fig. l, and preferably extends alittle below the smooth edge. The several clamping sections are eachpressed down upon the supporting frame, J 3, or upon the subjacentfabric, by a spring, J8, secured to the clamp frame. The cloth-plate isprovided with a rectangular flange or rib, K, around the needle hole,corresponding in form and size with lthe clamp frame, J i. The clampframe is supported vertically above the clothplate liange by theslide-bar, J 6, which is vertically adjustable in the end of the upperbracket-arm. Slide movements are communicated to the slide-bar by meansof the lever, J9, and springs, J1", and J12. The lever is pivoted uponthe bracket; the spring, Jl), secured to the lever to bear upon the topor head, JIS, of the slide-bar to press it down; and the spring, J1?, issecured to the bracket in position to press upward upon the head, J13,or intervening lever, J9, to lift the slidebar and clampto the positionshown in Fig. l. The clamp is pressed down to the position shown in Fig.4, to bear upon the cloth-plate or interposed fabric, by means of thetrip-lever, J1, pivoted upon the bracket-arm, which is turned from theposition shown by the solid lines in Fig. l. When the clamp is forceddownward into engagement with the fabric, the outer serrated edges ofthe clamp sections strike the fabric first and firmly engaging therewithdraw and stretch it down over the outer side of the cloth-plate flange,K, while the inner smooth edgeof the sections draws the fabric againstthe inner side of the clothplate `flange and increases the tension uponthat part of the fabric inclosed by the clamp. By inserting theornamental figure in the fabric While thus clamped upon the cloth-plate,the tension of the stitches forming such figure will simply restore thefabric to its normal condition when released from the clamp, leaving itsmooth and free from wrinkles.

What we claim as new, and desire to secure by Letters Patent, is

l. The combination with a sewing-machine and stitch-forming mechanism;of a slideplate movable transversely ofthe needle path a cloth-platesupported by the slide-plate and movable transversely of the slide-plateguides; a pair of pattern-chains; a series of detachable Wiper-teethlocated upon the chains according to a predetermined pattern; revolublechain-supporting wheels; means, substantially as described, forimpartingto the chain-wheels intermittent revoluble movements; a pair ofbifurcated levers each having an intermediate passageway for the wiperteeth, and oppositely-located, beveled, toothengaging surfaces whichconverge to such passageway; adjustable connections between such leversand movable plates; and a cloth clamp, substantially as described.

2. In an ornamental sewing machinehaving a movable cloth-plate and atoothed patternchain; a bifurcate lever, actuated by such chain andconnected with the cloth-plate, comprising an arm pivoted to vibrate ina horizontal plane, a biturcate frame pivoted upon the arm to vibrateina vertical plane, a spring connection between the arm and frame, andbeveled tooth-engaging jaws upon the bifurcate frame, substantially asdescribed.

3. In an ornamentalsewing-machinehaving a movable cloth-plate and atoothed patternchain, the combination with a bifucate lever andconnections between such lever and movable plate; of a pair of beveled,tooth-engaging jaw-plates detachably and adjustably secured to the armsof the bifurcate lever, substantially as described.

4. rlhe combination with a sewing-machine cloth-plate havinga raisedflange around the needle-hole; of a movable cloth-clamping frame adjustably supported vertically above such flange; and a plurality ofspring-controlled clamping-sections supported by the cloth-clampingframe, and vertically movable thereon, substantially as described.

5. The combination with a sewing-machine cloth-plate having a liangeraised therefrom in the general form of a rectangle with the needle-holein the center; of a cloth-clamp comprising a vertically adjustablerectangular frame; and a spring-controlled clamping section, U-shaped incross-section, on each side-bar of the rectangular frame, the severalsections having their lowerinner edges smooth and their lower outeredges serrated, substantially as described.

6. The combination with a sewing-machine needle and stitch-formingmechanism; of a slide-plate movable transversely of the needlepath; acloth-plate supported by the slideplate and movable transversely of theslideplate guides; a raised flange around the needle-hole in thecloth-plate; means for communicating to the two plates separate slidemovements; and a vertically adjustable vclothclamp supported by thecloth-plate vertically above the raised flange, and comprising aplurality of spring-controlled sections vertically movable independentlyof `each other, substantially as described. l

In testimony whereof we have hereunto set our hands this 16th day ofMarch, 1891.

THEO. F. BARNUM. J OHN MCDERMOTT.

Witnesses:

Guo. A. MosHER, FRANK C. CURTIS.

IOO

